Student loan — Maximus Federal Services, Inc. (CA)

Trouble with how payments are being handled. I have two loans that have been transferred to Aidvantage. One is due to start repayments in XXXX. It is for {$12000.00} at XXXX XXXX interest for XXXX years. Aidvantage has this calculated as $ XXXX. It should be ~ $ XXXX. I called on XX/XX/23 and the service representive agreed with my calculations. She said the loan would be redisclosed and corrected. On XX/XX/23, the monthly bill was still incorrect. I submitted an email through the company 's website. Today, XX/XX/23, I checked and the bill amount is still incorrect/unchanged. The company is planning to withdraw money from my account on XXXX. I have been on hold today for XXXX minutes with no answer. I tried the chat function and it stated " We are currently having heavy volume.